The Experts below are selected from a list of 17382 Experts worldwide ranked by ideXlab platform
Zhenhua Chen - One of the best experts on this subject based on the ideXlab platform.
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Preparation of several aluminum alloys by solid–liquid mixed Casting process
Journal of Alloys and Compounds, 2008Co-Authors: Ding Chen, Zhenhua ChenAbstract:Abstract A new Semi-Solid Casting technology, solid–liquid mixed (SLM) Casting, has been developed for the preparation of some fine-grained aluminum alloys with high alloy content. In this process, alloy powder with the same composition or with good wettability was added into the melt and then immediately stirred until the powder is uniformly distributed into the mixture. Compared with common Casting and Semi-Solid Casting process, aluminum alloys obtained by this process have better morphology and mechanical properties.
S.w. Youn - One of the best experts on this subject based on the ideXlab platform.
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horizontal reheating of aluminum alloys and semi solid Casting for a near net shape compressor component
Journal of Materials Processing Technology, 2003Co-Authors: C G Kang, Youngho Jung, S.w. YounAbstract:Abstract A Semi-Solid Casting will have a higher internal integrity, mechanical properties and dimensional accuracy than a conventional Castings. This process can reduce the manufacturing costs and finished weight for critical components. Semi-Solid Castings are capable of greater dimensional repeatability, this affording considerable savings when extensive machining, salvage and scrap are key variables in the current automotive product. The most important factors regarding the Semi-Solid die Casting process are the reheating method of the raw materials to the Semi-Solid state, the specifications of the Semi-Solid die Casting machine, the optimal injection conditions and die design. Thus, in the present work, a horizontal-type induction heating system to obtain the optimal reheating conditions for the Semi-Solid die Casting process was designed and manufactured. The mechanical properties of Semi-Solid die Castings for varying die temperatures, injection velocity and applied pressure were investigated, and the relationship between applied pressure and stroke to assess Semi-Solid die castability was proposed. Semi-Solid die Casting experiments to replace heavier cast iron compressor products with lightweight aluminum Castings were also carried out. The possibility of their use for compressor parts was verified.
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Experimental investigation of Semi-Solid Casting and die design by thermal fluid-solidification analysis
Journal of Materials Processing Technology, 2001Co-Authors: Chung-gil Kang, Young-ki Son, S.w. YounAbstract:Abstract In the Semi-Solid Casting process, various defects are strongly affected by the die shape rather than by other fabrication parameters because the Semi-Solid materials have to travel a relatively long distance to fill the die cavity through a gate during the filling time. To obtain high quality component with the Semi-Solid Casting process, it is important to obtain a homogeneous distribution of solid particles without liquid segregation until the die is completely filled. A gate shape with a different runner system was investigated to produce a near-net-shape compressor component called a cylinder block. Die design by computer simulation has some advantages compared with the conventional process that is performed by the designer’s experiences and trial-and-error. The experiment of Semi-Solid Casting was performed with the conventional die design concept. Various defect shapes were found on the surface of the Semi-Solid cylinder block parts. Evaluation of die gate system to obtain part without defects was realized by computer simulation. MAGMAsoft performed the die filling and solidification analysis of the Semi-Solid Casting process with the add-on module ‘thixo’. A designed new gating system considering thermal fluid and solidification phenomena was suggested by the filling simulation.
Ding Chen - One of the best experts on this subject based on the ideXlab platform.
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Preparation of several aluminum alloys by solid–liquid mixed Casting process
Journal of Alloys and Compounds, 2008Co-Authors: Ding Chen, Zhenhua ChenAbstract:Abstract A new Semi-Solid Casting technology, solid–liquid mixed (SLM) Casting, has been developed for the preparation of some fine-grained aluminum alloys with high alloy content. In this process, alloy powder with the same composition or with good wettability was added into the melt and then immediately stirred until the powder is uniformly distributed into the mixture. Compared with common Casting and Semi-Solid Casting process, aluminum alloys obtained by this process have better morphology and mechanical properties.
Saeid Ghaderi - One of the best experts on this subject based on the ideXlab platform.
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A Novel Process in Semi-Solid Metal Casting
Journal of Materials Science & Technology, 2012Co-Authors: Bijan Abbasi-khazaei, Saeid GhaderiAbstract:In this research a new process for Semi-Solid Casting of ductile iron based on the high nucleation rate combined with locally mechanical stirring is presented. In this process at first fully liquid ductile iron was poured on the peripheral surface of a wheel rotating against pouring direction. At this stage, the solid crystals nucleated at the chilling surface were pushed to the melt by a heat resistance steel cutter and finally the Semi-Solid slurry was generated. Reheating treatment was done on the samples to achieve more efficiency of Semi-Solid Casting process. The effects of the travelling distance of solid particles during Casting, the reheating time and temperature were examined. The results showed that the process effectively changes the dendrite structure to globular one.
Bijan Abbasi-khazaei - One of the best experts on this subject based on the ideXlab platform.
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A Novel Process in Semi-Solid Metal Casting
Journal of Materials Science & Technology, 2012Co-Authors: Bijan Abbasi-khazaei, Saeid GhaderiAbstract:In this research a new process for Semi-Solid Casting of ductile iron based on the high nucleation rate combined with locally mechanical stirring is presented. In this process at first fully liquid ductile iron was poured on the peripheral surface of a wheel rotating against pouring direction. At this stage, the solid crystals nucleated at the chilling surface were pushed to the melt by a heat resistance steel cutter and finally the Semi-Solid slurry was generated. Reheating treatment was done on the samples to achieve more efficiency of Semi-Solid Casting process. The effects of the travelling distance of solid particles during Casting, the reheating time and temperature were examined. The results showed that the process effectively changes the dendrite structure to globular one.
